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    <title>Streamgraph &#124; the D3 Graph Gallery</title>

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        <h1>Streamgraph</h1>
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          A
          <a href="https://www.data-to-viz.com/graph/streamgraph.html"
            >streamgraph</a
          >
          is a type of <a href="stackedarea.html">stacked area chart</a>. It
          represents the evolution of a numerical variable for several groups.
          Areas are usually displayed around a central axis, and edges are
          rounded to give a flowing shape.
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        <div class="mySeryTitle">Step by step</div>
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        <p>
          Building a streamgraph follows the same process than for a
          <a href="stackedarea.html">stacked area chart</a>. Stack the data with
          the <code>d3.stack()</code> function, but use the
          <code>stackOffsetSilhouette</code> offset to position shapes around
          the central axis.
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        >
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                <div class="portfolio-hover-content">
                  <p>Most basic</p>
                  <hr />
                  <p class="explanation_portfolio">
                    The most basic streamgraph you can do in d3.js. Keeping only
                    the core code.<br /><br />Input format: wide (untidy)
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/streamgraph_basic.png"
                alt=""
              />
            </a>
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                  <p>Template</p>
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                    A clean template to start with. Include color palette, clean
                    axis with title, hover feature and more.
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              </div>
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            </a>
          </div>
        </div>

        <br /><br /><br /><br />
        <div class="mySeryTitle">Template</div>
        <hr />
        <p>
          Here is a streamchart showing the evolution of a few baby names in the
          US during the previous century.
          <a href="https://www.data-to-viz.com/story/OneCatSevOrderedNum.html"
            >Read more</a
          >
          about it here. Axis are customized, color palette is used, hover
          feature is added.<br />Hover a group to get the name.
        </p>
        <a
          class="btn btn-secondary btn-md text-uppercase"
          href="graph/streamgraph_template.html"
          >Get code</a
        >
        <center><div id="my_dataviz"></div></center>

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          A few blocks with more complicated codes to showcase the possibility
          of d3 for streamgraphs.
        </p>
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            >
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                  <p>Transition in streamgraph</p>
                  <hr />
                  <p class="explanation_portfolio">
                    Shows how to transition data in streamgraph. Always good to
                    read Mike Bostock's code.
                  </p>
                </div>
              </div>
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                src="img/block/block_streamTransition.png"
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              />
            </a>
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                    Handy tooltip to give group name on hover.
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